The Atmospheric Effects of Stratospheric Aircraft Project : An Interim Review of Science and Progress
National Research Council
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From Earth to Orbit : An Assessment of Transportation Options
National Research Council
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Advanced Power Sources for Space Missions
National Research Council
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Certified Flight Instructor Test Prep 2013 (PDF eBook) : Pass your test and know what is essential to become a safe, competent pilot from the most trusted source in aviation training
ASA Test Prep Board
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Sport Pilot Test Prep (PDF eBook) : Pass your test and know what is essential to become a safe, competent pilot from the most trusted source in aviation training
ASA Test Prep Board
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Commercial Pilot Test Prep 2014 (PDF eBook) : Study & Prepare for the Commercial Airplane, Helicopter, Gyroplane, Glider, Balloon, Airship and Military Competency FAA Knowledge Exams
ASA Test Prep Board
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Instructor Test Prep 2014 : Study & Prepare for the Ground, Flight, Military Competency and Sport Instructor: Airplane, Helicopt
ASA Test Prep Board
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General Test Guide 2014 (PDF eBook) : The "Fast-Track" to Study for and Pass the Aviation Maintenance Technician Knowledge Exam
ASA Test Prep Board
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Airframe Test Guide 2014 (PDF eBook) : The "Fast-Track" to Study for and Pass the Aviation Maintenance Technician Knowledge Exam
ASA Test Prep Board
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Powerplant Test Guide 2014 (PDF eBook) : The "Fast-Track" to Study for and Pass the Aviation Maintenance Technician Knowledge Exam
ASA Test Prep Board
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